Crash Course: Study Hall Algebra #6: Exponents and Scientific Notation
Crash Course

It’s intuitive to think about squaring or doubling something. It’s just a number multiplied by itself.

Mathalicious: Square Dancing
Mathalicious

In this lesson, students use concrete models to explore square numbers and square roots and confront the philosophical and moral questions posed by the existence of irrational numbers.

youcubed: Irrational Folding (9-12)
youcubed (Stanford University)

This activity is designed to give students the opportunity to explore, visualize, and create a representation of the relative lengths of the square roots from 1-10.

Illuminations: Magic Squares
Illuminations (National Council of Teachers of Mathematics)

This lesson explores magic squares from both a historical and mathematical perspective.

Illuminations: Allow Me 2 Reiterate
Illuminations (National Council of Teachers of Mathematics)

In this grades 9‑12 lesson, students use a computer software program to assist them in determining the square root of 2 to a given number of decimal places.

Illuminations: Difference of Squares
Illuminations (National Council of Teachers of Mathematics)

This activity uses a series of related arithmetic experiences to prompt students to generalize into more abstract ideas.

Illuminations: Stacking Squares
Illuminations (National Council of Teachers of Mathematics)

This lesson prompts students to explore ways of arranging squares to represent equivalences involving square- and cube-roots.